Chimney Terminal DN80, Black

Product detailed description

The terminal end-piece of the chimney/flue for its outlet to the outside of the building.

Chimney Terminal DN80, Black

Frequently Asked Questions

• How exactly do I choose the right output for a condensing boiler? The basis is the calculated heat loss of the heated building (most reliably taken from the project documentation or an energy certificate). If you don’t have a project, you can estimate roughly 60-100 W per m² of floor area for a normally insulated house built after 2000, or 100-150 W/m² for an older, uninsulated house - the exact figure varies depending on the number of floors, ceiling height, the number and quality of windows, and the building’s orientation. A boiler oversized for the required output switches on and off more often (so-called cycling), which shortens its lifespan and reduces efficiency; an undersized boiler, on the other hand, cannot heat the house sufficiently on frosty days.
• Why is a condensing boiler more economical than a conventional one? A condensing boiler additionally makes use of the heat hidden in the water vapour produced when gas is burned - in a conventional boiler this escapes unused through the flue, while in a condensing boiler it is cooled below the so-called dew point, the vapour condenses, and the released heat is returned to the heating circuit. As a result, condensing boilers achieve an efficiency of approximately 105-110% relative to the calorific value of the gas, compared with the usual 85-92% for conventional boilers.
• What type of flue gas exhaust does this boiler need? Most modern condensing boilers are so-called “turbo” units (with a sealed combustion chamber) and require a coaxial (concentric) or a separate flue gas exhaust and combustion air intake routed through an exterior wall or the roof - so a functioning chimney is not needed. You will find the exact type and maximum length of the exhaust (depending on the 60/100 or 80/125 mm diameter) in the technical documentation for the specific model, or you can consult our customer service.
• What does the ErP energy class stated for the boiler mean? This is the mandatory efficiency labelling for heating appliances under the EU ErP (Ecodesign) directive, similar to the energy labels used for refrigerators. Condensing boilers commonly achieve class A, or higher in combination with room control (e.g. A+ when using weather-compensated control together with a room thermostat).
• Can I install and connect this boiler myself? No. By law, connection to the natural gas supply, the electrical network and the flue gas exhaust must be carried out exclusively by a person with the appropriate qualification (most often an authorised service technician for the given brand or a certified gas equipment inspector). After installation, the boiler must be commissioned by the manufacturer’s authorised service, which is usually also a condition for the warranty to remain valid.
• What about servicing and the warranty? Most manufacturers require a regular annual service inspection by an authorised service provider in order to keep the warranty valid even after its standard expiry (extended warranty for regular servicing is common especially with brands such as Vaillant, Protherm, and Viessmann). You will find the exact warranty terms in the warranty certificate supplied with the boiler.
• What is included in the delivery of this specific product? The exact contents of the package (the boiler itself, possibly a hot water storage tank, room control and other accessories in the case of a set) are stated in the product name and its technical parameters above on this page.